[nrf fromlist] boards: nordic: nrf54h: fix pm_ramfunc region

Fix region for PM ram function on radiocore.

Upstream PR #: 97792

Signed-off-by: Adam Kondraciuk <[email protected]>

Author: adamkondraciuk

boards/nordic/nrf54h20dk/nrf54h20dk_nrf54h20_cpurad.dts

@@ -135,7 +135,7 @@ zephyr_udc0: &usbhs {
 		/* cache control functions - must be executed from RAM */
 		pm_ramfunc: cpurad_s2ram@2302ff40 {
 			compatible = "zephyr,memory-region", "mmio-sram";
-			reg = <0x2302ff80 192>;
+			reg = <0x2302ff40 192>;
 			zephyr,memory-region = "PMLocalRamfunc";
 		};
 	};